Chapter I

PAGE
ON THE DIFFERENTIATION OF MAN FROM THE ANTHROPOIDS 1

§ 1. _The Hypothesis._—That Man was differentiated from
the anthropoid stock by becoming a hunter; perhaps in
the Oligocene period 1-3

§ 2. _What the Hypothesis Explains._—World-wide range;
why the earliest known men were hunters; the erect
gait; specialisation of hands; reduction of arms;
and of teeth and jaws; modification of skull; social
co-operation; rudiments of speech; intelligence;
control of fire 4-13

§ 3. _Minor and Secondary Consequences._—Alimentary
canal; loss of seasonal marriage; naked skin;
cannibalism; division into races; Nordic sub-race 13-21

§ 4. _Prey and Competitors._—Climate and landscape
in Oligocene and Miocene; animals, herbivorous;
anthropoids and their stature in late Oligocene;
carnivorous contemporaries 21-8

§ 5. _Conclusion._—Summary 28-9